University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Commercial product

Classification: Commercial product -> cosmetic cream

Citations 1

"Determination Of Salicylate In Beverages And Cosmetics By Use Of An Amperometric Biosensor"
Fresenius J. Anal. Chem. 1996 Volume 356, Issue 1 Pages 75-79
M. Ehrendorfer, G. Sontag Contact Information and F. Pittner

Abstract: A fast and selective enzymatic method for the determination of sialicylate in beverages and cosmetics has been developed. The enzyme salicylate hydroxylase was immobilized covalently onto a glassy carbon working electrode of a wall-jet cell coupled with a flow injection analysis system. The salicylate is enzymatically converted to catechol, which can be detected amperometrically on the glassy carbon electrode at +0.45 V. The response of the biosensor is linearly proportional to the concentration of salicylate between 725 nmol/l and 700 µmol/l. A high sample throughput (60 h-1) is possible, and the biosensor is stable for more than three months. Sample pretreatment for beverages and hair lotions is easy and fast. For creams, an extraction of salicylate is necessary. Relative standard deviations are less than 5.5% and the recoveries are between 9 and 105%.
Salicylate Amperometry Sensor Electrode Electrode Enzyme